[IOS SDK]- TouchesBegan 以特定对象开始？

Question

当我触摸屏幕上的任意位置时，会触发 TouchBegan 事件。但如果我触摸特定对象（如 UIImageView），我无法管理如何？

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

 UITouch *touch = [[event allTouches] anyObject];

 CGPoint location = [touch locationInView: touch.view];

 imageView.center = location;

}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

 [self touchesBegan:touches withEvent:event];

}

Answer 1

好的，找到了解决方案，代码如下：

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch *touch = [[event allTouches] anyObject];

    if ([touch view] == imageView) {

        CGPoint location = [touch locationInView: self.view];

        imageView.center = location;

    }

}